Often, we have a need to collect data from customers. Immediate thinking is to make an app change, push it up to store, get people to upgrade (doesn't happen!) and then pray. A little more savvy version of this is making a web app and then send the links with a uuid based customer identification.
Why not just ask users to email you the data? People know how to use email! Following snippet shows how easy it is to automate fetching the data and then sending to a script to process.